The new units, which are used by tugboats and other similar vessels, are from the newly developed, rexpeller azimuth thruster E-series capable of rotating in any direction, maritime news provider Lloyd's List reports.

Compared to conventional thruster series, these units are said to reduce energy consumption by 7%.

KHI has said it intends to build more gas-related vessels in its two joint ventures with China Cosco Shipping included building ships fuelled by the alternative bunker fuel, liquefied natural gas.